Pressure Measurement and Calibration.
Pressure Measurement and Calibration
A bench top unit designed to introduce students to pressure, pressure scales and common devices available to measure pressure.The equipment comprises a Dead-weight Pressure Calibrator (DPC) to generate a number of predetermined pressures, connected to a Bourdon gauge and electronic pressure sensor to allow their characteristics, including accuracy and linearity, to be determined. The DPC consists of a precision ground piston and cylinder with a set of weights giving an operating range of 20 kNm-2 to 200 kNm-2. The Bourdon gauge and pressure sensor are mounted on a manifold block with a separate reservoir to contain the hydraulic fluid (water for safety and ease of use). Valves allow for easy priming, restricted flow of water to demonstrate the application of damping and the connection of alternative devices for calibration. The gauge supplied is a traditional 6″ diameter industrial instrument but fitted with a clear rotary scale to allow observation of the Bourdon tube and indicator mechanism. The scale is calibrated in degrees of rotation (independent of units of pressure) in addition to the usual scale calibrated in units of kNm-2. The electronic pressure sensor supplied incorporates a semi-conductor diaphragm that deflects when pressure is applied by the working fluid. This deflection generates a voltage output that is proportional to the applied pressure.